Butt-hinge.



\ H. FLEISCHER.

BUTT HINGE.

APPLICATION FILED APR. 22. 19x5.

Patented J ul y 24,1917.

' '1 i ME 1 Q WITNESSES.- INVENTOR.

} v 2 a: I Hermafl Fleischer:

MW k mm ATTORNEY UNITED STATES PATENT OFFICE.

HERMAN FLEISCHER, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEY WORKS, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

BUTT-HINGE.

Specification of Letters Patent.

Patented July 24, 1917.

To all whom it may concern:

Be it known that I, HERMAN FLEISCHER, a citizen of the United States, and a resident of New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Butt-Hinges, of which the following is a specification.

The object of this invention is to provide for the manufacture of devices of the character described of metal of comparatively light gage, and by novel construction to increase the bearing surface of the knuckles.

In the drawings Figure l is a front view of a butt hinge open.

Fig. 2 is an end view showing a knuckle.

In carrying out my invention the leaves a, a, which are of a comparatively light gage, have the knuckles b, 6, formed integrally therewith by rolling the metal upon itself. In order to permit of the use of light gage metal and insure suffi'c'ently heavy wearing surfaces for the knuckles, I roll the metal forming the knuckles upon itself to a suflicient extent to produce double thick walls, as clearly appears in the drawings.

In addition to providing a double thickness of wall for the knuckles and thus permit the leaves of the butt being made from a light gage stock, the seam rolling of the metal in the knuckle provides a space within which lubricant will be secreted and retained.

Copies of this patent may be obtained for five cents each, by addressing the formed by the double.

In order to carry this invention into practice it is only necessary to increase the length of the projections which are rolled up to form the knuckles, to a suflicient extent to provide the necessary amount of material. Since the two leaves are cut out of a sheet of stock, the wastage is not increased.

This invention provides a method for producing a thin-leafed butt with heavy rolled knuckles inexpensively, and of ample strength. The feature of novelty resides in the relative thickness of the leaf and the wall of the knuckle.

I claim as my invention '1. In a butt hinge, a leaf, and a knuckle integral therewith formed from a single piece of metal and provided with a laminated wall.

2. That improvement in the art of manufacturing butt hinges formed from sheet metal which consists in taking a sheet of uniform gage and cutting away one edge thereof to form rolling the metal of said projections upon itself to produce a knuckle, the wall of which is of at least double the gage of the leaf portion.

S. W. PARSONS, W. E. DOANE.

"Commissioner of Patents,

Washington, D. Q,

projections, and then in 

